fix: use display-width-aware truncation for Copied message#41
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Replace chars().count()/chars().take() with text_utils::truncate_to_width() so that CJK and other full-width characters are correctly measured by display columns instead of Unicode scalar count. Co-Authored-By: Claude Opus 4.5 <[email protected]>
Verify that truncate_to_width behaves correctly for the meta_command "Copied" display: CJK-heavy strings are truncated within 60 columns with an ellipsis, and short strings pass through unchanged. Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Summary
chars().count()/chars().take()withtext_utils::truncate_to_width()in the history browser "Copied" message, so CJK and other full-width characters are correctly measured by display columns